I have see in some really cool pictures, how people put coral verticlly on the tank walls, and the bottom being just the substrate. How do I do this in my tank (Its not set up yet by the way)? Do I use apoxy or a rack system or what?

Marine Epoxy putty is probably the best thing to use for Hard corals. For soft corals I would try and keep the frags attached to small pieces of LR or substrate and this will help the putty get a better grip on the soft corals. The reason for leaving LR or substrate attached is because soft corals have a tendancy to secrete a sort of slime/mucus when disturbed which makes adhesion quite impossible.

Another way you can try is to use plastic egg-crating and attach LR to it then let the corals grow in the small gaps, they will eventually spread out and fill in.

also, if you go down the egg-create route, you can just tie the small chunk of live rock rubble to the egg crate with nylon fishing line aswell...worked well in the past...I know some people have also tried using the super glue gel, but with softies, the slime stops it from sticking too good...

Plus, after 3 or 4 months, the egg crate will be covered in corraline algae anyway so it should blend in with the back of your tank...